Melissa Etheridge became an unlikely spokesperson for marijuana legalization. Today she is an even more unlikely entrepreneur, helping to create a marijuana-infused wine. Other celebrities including Snoop Dogg, Tommy Chong, and the Marley family.

Amid growing awareness of heroin abuse and overdoses, a new public service campaign has police officers - who are often first on the scene - administer the drug Narcan which may reverse the overdose’s effects and save lives.

A teenager on Christmas break in the UK reportedly stabbed his mother, then cut off his penis while allegedly high on the party drug meow meow, otherwise known as mephedrone, a synthetic, amphetamine-like stimulant.

A novel New Zealand law that could legalize some designer drugs is being scrutinized with interest by other countries struggling to keep up with the proliferation of "party pills" and similar products.